Les échantillons de matériaux
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Materials Literature
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Wirksames Frostschutzmittel
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Utilisation des fibres de verre pour armer le béton
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Determinación de calcio y de magnesio en la caliza por el método del tetracetato de etilenodiamina
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El hormigón vertical (2ª. Parte) - Dimensiones y características de la cocción en el mismo (continuación)
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Thermal Conductivity: IX, Experimental Investigation of Effect of Porosity on Thermal Conductivity
The effect of isometric approximately spherical pores and anisometric cylindrical pores on the thermal conductivity of alumina, graphite, and nickel has been investigated. Pore orientation is found to affect profoundly the thermal conductivity for a given porosity. At temperatures below about 500°C. the conductivity o…
Distortion of a Crystal by Point Imperfections
The expression u=cr/r3, (where c is a constant) sometimes assumed for the displacement around a point imperfection (interstitial or substitutional impurity, lattice vacancy) gives a nonzero stress at the surface of the solid. The additional ``image displacement'' necessary to insure that this stress vanishes is usuall…
Electrical measurements in the study of immersed paint coatings on metal. I. Comparison between capacitance and gravimetric methods of estimating water‐uptake
Abstract An electrical capacitance method of estimating the water‐uptake of paint films on metal immersed in sea‐water has given, for many paint formulations, values agreeing with those obtained by a gravimetric method. For a few paints, however, pronounced disagreement was shown between values obtained by the two met…
Zur Chemie und Technologie der Silicone
Abstract Es wird der Stand der technologischen Entwicklung der Silicone in Deutschland gezeigt und auf sich abzeichnende Entwicklungen hingewiesen. Auf manchen Gebieten bilden Kieselsäureester und Polykieselsäureester eine interessante Ergänzung des technologischen Bildes der auf Polysiloxan‐Verknüpfungen aufgebauten…
The effect of static and dynamic loading and temperature on the yield stress of iron and mild steel in compression
Abstract Cylindrical test samples were compressed statically and dynamically at temperatures ranging from +100 to -195°C and the yield stress, form of yield and surface markings observed. A Hopkinson bar and throw -off rod and electric resistance strain gauges were used for stress determinations under dynamic loads. T…
Influence of Addition of Nickel on Thermal Expansion, Rigidity Modulus and Temperature Coefficient of Alloys of Cobalt, Iron and Chromium, Part II. Alloys Added with 30 and 40 percent of Nickel
The influence of additions of 30 and 40 percent of nickel on thermal expansion in the range from 10° to 50°, rigidity modulus at 20° and its temperature coefficient in the range from 20° to 50°, of alloys of cobalt, iron and chromium has been determined. The relations between those properties of nickel-added alloys an…
The heats of vaporization of the elements
The first page of this article is displayed as the abstract.
Polycylic systems. Part VI. 8-meso-α-Naphthanthr-10-one and 2 : 3-8 : 9-dibenzoperylene
E. A. Braude, J. S. Fawcett and A. A. Webb, J. Chem. Soc., 1954, 1049 DOI: 10.1039/JR9540001049
Phosphoric Acid Anodizing of Aluminium and its Application to Electroplating
SynopsisThe results are presented of a quantitative study of the phosphoric acid anodizing of high purity aluminium. The effects of electrolyte concentration, temperature, anodizing time, current density and air agitation on the coating weight, metal loss, coating ratio and density of the anodic coating were investiga…
The production of active solids by thermal decomposition. Part IV. Vermiculite
S. J. Gregg and R. K. Packer, J. Chem. Soc., 1954, 3887 DOI: 10.1039/JR9540003887
A Note on a Theory of the Uniaxial Ferromagnetic Anisotropy Induced by Cold Work or by Magnetic Annealing in Cubic Solid Solutions
In order to explain the origin of the uniaxial ferromagnetic anisotropy induced by cold work or by magnetic annealing in cubic solid solutions, the anisotropy energy caused by an anisotropic distribution of solute atoms produced by cold work or magnetic annealing has been calculated using the same model as in Van Vlec…
The preparation of polyamides containing heterocyclic groups from furfural and levulinic acid
Abstract New fiber‐forming polyamides containing heterocyclic groups were prepared form furan 2,5‐dipropionic acid and the corresponding tetrahydrofuran compound which were found to be prepared easily from furfural and levulinic acid. For example, poly‐decamethylenetetrahydrofuran 2,5‐dipropionamide (intrinsic viscosi…
The Crystal Structure of Stromeyerite, AgCuS: A Possible Defect Structure
Article The Crystal Structure of Stromeyerite, AgCuS: A Possible Defect Structure was published on December 1, 1954 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 106, issue 1-6).
Solutions of metal soaps in organic solvents. Part IV. Direct-current conductivity in solutions of some metal oleates in toluene
S. M. Nelson and R. C. Pink, J. Chem. Soc., 1954, 4412 DOI: 10.1039/JR9540004412
Field Emission Current-Density Distribution
A quantitative measurement of the current-density distribution over the surface of monocrystalline tungsten field emitters is obtained by densitometric analysis of calibrated photographic negatives of emission patterns observed with a modified Mueller projection tube. Analysis of distributions thus obtained permits an…